TY - CONF T1 - Indoor Positioning in Large Environments: Ultrasonic and UWB Technologies T2 - International Conference on Indoor Positioning and Indoor Navigation Y1 - 2019 A1 - Gualda, D A1 - A. Hernandez A1 - J. M. Villadangos A1 - UreƱa, J. A1 - Jimenez, A. A1 - F. Seco JF - International Conference on Indoor Positioning and Indoor Navigation PB - IPIN CY - Pisa, Italia SN - 978-1-7281-1788-1 ER -